Arrange the following segments to form the most syntactically accurate and coherent complex sentence. Choose the correct sequence. Fixed Segment: Although the debate continued late into the evening, A. participants presented increasingly nuanced arguments, B. tempers occasionally flared amongst the crowd, C. the moderator guided the discussion with careful precision, D. new perspectives emerged from unexpected sources.

1. ACDB
2. CBAD
3. DCBA
4. BDAC Choose the correct one-word substitution for the given